Answer:
A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
The periodic table is essential for organizing chemical information and facilitating the study of element properties and interactions.
The periodic table is a tabular display of the chemical elements organized based on three major factors: their atomic numbers, electron configurations, and recurring chemical properties. In this table, the elements are arranged in an increasing order of their atomic numbers (which is the number of protons in an atom's nucleus). This layout ensures that elements with similar properties appear in vertical columns, known as 'groups.'
Additionally, the table is structured so that elements with the same number of electron shells fall into horizontal rows, known as 'periods.' The periodic table was first devised by Dmitri Mendeleev in 1869, who noticed that the properties of elements exhibited a repeating pattern, or periodicity, when arranged by atomic weight.
Today, the modern periodic table is a crucial tool in chemistry, helping scientists understand and predict the behavior of elements and compounds in chemical reactions. Its standard form includes a main body with an eighteen by seven grid and a smaller section with two rows at the bottom comprising the lanthanides and actinides.
Fossils of snakes with hind limbs but no forelimbs
have been discovered. Which of the following
conclusions is best supported by this fossil
evidence?
A Snakes are likely to evolve limbs in the future.
B Snakes are well adapted to live on land without
limbs.
C Snakes have evolved from an ancestral reptile
with limbs.
D Snakes are poor competitors compared to
reptiles with limbs.
C
The fossil was not of a snake but rather an ancestor of the snakes. The ancestor had short hind legs and gradually, over time, lost them to suit its needs in its particular environment.
Answer:b
Explanation:
One difference between the cells in a human body and bacterial cells is that bacterial cells have
Answer:
a cell wall made up of peptidoglycan
What factors in earths relationship to the sun make life on earth possible
The distance from the Sun allows for the right amount of light absorption, allows the right intensity of heat, and the gravitational pull of the sun on the earth keeps it from going out into outer space.
Hope this helped :)
Answer:
The earth is just the right distance from the sun to allow life not to freeze or burn to death.
the rock record indicates that photosynthesis began on earth about 3.5 million years ago. true or false
Answer:
The answer if false
Explanation:
Answer:
false
Explanation:
Help!!!helppppppppppppppp
asexual reproduction
genes
sexual reproduction
genetic diversity
protists
animals
plants
mammals
Answer:
In asexual reproduction, an organism inherits it's genetic material from a single parent. The new organism has the same genes as it's parent. In sexual reproduction, an organism inherits genetic material from two different parents. Sexual reproduction increases genetic diversity, whereas asexual reproduction does not. Plants, animals, and simple protists, can reproduce sexually or asexually. Mammals only reproduce sexually.
Which type of soil is most likely to be found in horizon E?
A. A layer of bedrock
B. A layer of decayed plant matter
C. A layer of parent material
D. A layer of pale, Sandy soil lacking clay and iron
Answer:
D. A layer of pale, sandy soil lacking clay and iron
Explanation:
The soil is complex, composed of multiple layers/horizons all of which have different characteristic that make every horizon to have its own special role in it. The horizon E is the third horizon from the top. This horizon is characterized by being mostly sandy, and because the water manages to go through it very easily it is a horizon in which there's heavy leaching going on. Because of the leaching, this horizon loses the clay, iron, and aluminium from it, thus they accumulate in the horizon below it. As a horizon it is very important, especially for the trees, as their root systems manage to develop very well in this horizon because it is loos and sandy.
Answer:
D. A layer of pale, sandy soil lacking clay and iron
Explanation:
Invasive species can enter a habit in many ways. How were these invasive species introduced?
A species of rats entered a habitat stowed away in a train -> unintentioal introduction
A man added invasive water hyacinths to beautify his private lake -> intentional introduction
A flood prompted many aquatic species to inhabit a new area -> loss of habitat
Hemophilia, Down syndrome, sickle-cell anemia, and cystic fibrosis are all examples of diseases that are
Answer:
Genetic Disorders?
Explanation:
Answer:
inherited from parents
Explanation:
study island
the splitting of an atom is called_______?plz answer asap
the splitting of an atom is called "nuclear fission".
Answer:
nuclear fission
Explanation:
What is one way a plain can form
Answer:
The plains can be formed in several ways, one of them is given by the accumulation of Sediments that have been attracted by the wind or the sea over the years, although it can also be due to the accumulation of Lava that has been deposited forming several layers of it and resulting in a large area of land.
Which of the following is a major function of the cell membrane?
A. To surround and support organelles in eukaryotic cells
B. To receive and send messages between cells
C. To provide rigid support to plant cells
D. To combine amino acids into long chains to make proteins
The major function of the cell membrane is to provide a barrier around the cell, control substance movement via its selective permeability, and facilitate cell communication, making option B ('To receive and send messages between cells') the best answer. Hence the correct option is B.
The cell membrane's structure, primarily made of a phospholipid bilayer, allows it to be selectively permeable, controlling which substances can enter and leave the cell. It is involved in various functions including protecting and supporting the cell, and actively participating in the transport of materials. It also has the important role of facilitating communication and signal transduction, which means option B, 'To receive and send messages between cells,' best describes a major function of the cell membrane. It's also worth noting that the cell membrane encloses the cytoplasm and houses membrane proteins which may vary from one cell type to another, contributing to the diverse functions of the cell membrane in different cellular environments. However, while it does provide some support, option B is a more encompassing choice that includes this function as part of its role in cellular communication and interaction.
what structure attaches muscle to bone
Answer:
tendons
Explanation:
A tendon attaches muscle to bone, transmitting the force from the muscle contraction to allow body movement.
Explanation:The structure that attaches muscle to bone is called a tendon. Tendons are made of tough connective tissue and serve to transmit the force generated when a muscle contracts, allowing the movement of the skeleton. For a skeletal muscle to pull on a bone and create movement at a joint, it has specific attachment points; the origin is where the muscle attaches to the fixed (stabilized) bone, and the insertion is where the muscle connects to the bone that gets moved.
Which of the following is true about the majority of LDCs?
Answer:
no They exhibit the highest per capita resource consumption................................... Overpopulation is more common in LDCs, but typically per capita resource consumption is higher in MDCs
Explanation:
Scientists notice structural similarities between fossils of a land animal and aquatic organisms they know the similarities are not a result of the two organisms having to adapt to similar environments. What can they attribute the structural similarities to ?
Answer: The correct answer is:
___________________________________________________
"common ancestry" .
___________________________________________________
{Note: The following answer choices would be "incorrect" :
1) " convergent evolution " ;
2) " transitional evolutions " ;
3) " similar mating habits " .}.
___________________________________________________
Hope this helps!
Best wishes!
___________________________________________________
Answer:
The scientists can attribute structural similarities to common ancestry.
Explanation:
In evolutionary biology, common ancestry or common descent illustrates how an array of species share a most contemporary communal ancestor. There is a huge proof of common ancestry of all forms of life on Earth. The common ancestry in between the organisms of various species originates at the time of speciation, in which establishment of new species occurs from a single ancestral population.
Neutron stars, smaller than white dwarfs, are thought to be remnants of _____.
Answer:
I think it's Supernova Events.
Explanation:
Hope i have helped you!
What product is harvested from trees
Answer: Maple syrup, sap/resin, chlorophyll.
Explanation: All three of these products can naturally be found in the trunk/leaves of a tree. However, if you are looking for products made from trees, here is a list:
Wine Cork
Natural Aspirin and Acne Medication.
Sponges
Chewing Gum
Carnauba Wax
Henna Dye
Rubber
Paper
If you need more, please notify me.
What term do scientists use to describe all the different forms of life on Earth? landscape biodiversity environment ecosystem
Answer:
The term that scientists use to describe the different forms of life on earth is biodiversity.
Explanation:
Biodiversity means biological diversity, a term that refers to the large number of species -among animals and plants- that exist on the planet. This diversity or variety is due, in principle, to the different genetic expressions that have resulted from evolutionary changes over time.
Biological diversity is a factor that defines the different ways in which an ecosystem can be presented and the interactions that can occur between living organisms.
The term Biodiversity is a compound word that comes from the words biology and diversity, first used in 1986 and recognized by the International Convention on Biological Diversity.
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Answer: Ecosystem or Biotop.
Explanation:
It represents a space that is inhabited by living organisms and their communities. As a rule, every living community occupies a particular living space and consumes it, which means finding food, breathing and using the area as protection. The scope mentioned is called a biotop. Different ecosystems in one climate zone create larger entities - biomes.
As one would expect, throughout the world there is a strong relationship between the quantity of energy a country uses and the size of its
Answer:
economy
Explanation:
Whichever country do we look at, there is a strong relationship between the quantity of energy that the country uses and the size of its economy. The more developed and the larger the economy of a country is, the more energy is demanded for the economy to be driven. This leads to high demand for certain natural resources that produce energy, as the industry needs power in order to function. We can easily see this if we take in consideration the biggest economies in the world, USA, China, Japan, Germany, UK, France, and then if we see how much energy each of them uses, so we will come to a conclusion that the biggest economies are the biggest users of energy.
Most animal cell membranes have proteins that pump ______ ions out of the cell and potassium ions into the cell.
Answer:
Sodium
Explanation:
Most cell membranes have protein that pumps sodium ions out of the cell and potassium ions into the cell.
Which of these indicates equilibrium in the community? A. seral B. pioneer C. ultimate D. intermediate E. climax
Answer:
E. climax
Explanation:
Even though it is not something that is very common in nature, there are still certain exceptions where certain communities manage to reach a point of equilibrium. This basically is a community of small number of dominant prominent species that create a stable ecosystem. This state of equilibrium is known as climax community. This type of community appears when the web of biotic interactions between the organisms becomes so intricate that there is no possibility of other species to be admitted in it.
Answer: E Climax
Explanation:
Elements are___
1 - a chemical substance composed of atoms of two or more different types of atoms
2- substances that are made up of only one type of atom
3- subatomic particles with a positive charge
4- only found on earth
An element in Chemistry is a substance made up of only one type of atom, possessing a unique number of protons in its atomic nucleus. Elements are not limited to earth as they can be found throughout the universe.
Explanation:In Chemistry, an element refers to a type of substance that is made up of only one type of atom, Therefore, the correct answer to your question is the second option: 'substances that are made up of only one type of atom'. This means that each chemical element possesses a unique number of protons, known as its atomic number, in its atomic nucleus. For example, hydrogen is an element and it is made up entirely of hydrogen atoms. On the other hand, water is a compound because it's made from two types of atoms - hydrogen and oxygen. Elements are not specific to Earth and can be found throughout the universe.
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Which of the following are limiting nutrients ?
Water
Carbon
Nitrogen
Phosphorus
Answer:
Nitrogen and Phosphorus
Explanation:
When the function of a whole ecosystem is limited because of a nutrient , which is present in limited amount, it is called as a limiting nutrient. The organisms uptake water and carbon directly from the environment as it is abundant in nature. The nutrients like nitrogen and phosphorous are present in limited amount and moreover they are not present in the form that can be directly taken up by the organism.
Thus, Nitrogen and Phosphorous are limiting nutrients.
A problem caused by the overuse of fertilizer that results in algal blooms like this is known as
A) red tides
B) decomposition
C) eutrophication
D) nutrient upload
C) Eutrophication is the answer
Have a Nice Day! :)
Answer:
The Answer is C. Entophication
Explanation:
Eutrophication is the process where water bodies receive excess nutrients that stimulate excessive plant growth.
Select all of the answers that apply:
1. Severe weather that has caused deaths includes _____.
light
rain
thunderstorms
hurricanes
tornadoes
floods
droughts
clear skies
Droughts , floods, tornadoes, hurricanes
Thunderstorms, Hurricanes, Tornadoes, Floods and droughts
The process in which plants draw water from their roots to their leaves where it evaporates into the atmosphere is called ____________.
A .evaporation
B. condensation
C. precipitation
D. transpiration
Why is transpiration important for plants?
A. It allows the plant to breathe.
B. It keeps the plant exercised.
C. It keeps plants from getting too dry
D. It helps to regulate their temperature.
Plants control transpiration by opening and closing their _________, which are similar to your ____________ when you perspire
A. leaves; skin
B. stomata; pores
C. flowers; hands
D. capillaries; veins
Answer:
1.D
2.C
3.B
Explanation:
hope this helps
Answer:
1. D
2. D
3. B
Explanation:
The only possible answer for the first question is transpiration because precipitation is essentially rain (and all its forms), condensation is the collection of water, and evaporation is simply water in gas form -- thus making D the "odd one out".
For the second question, we know that transpiration is heavily dependent on stomata/guard cells. Exercise has nothing to do with this topic, and transpiration has very little to do with dryness (which makes B and C incorrect). Finally, plants do NOT breathe through transpiration. Instead, they breathe through plant (cellular) respiration (which eliminates A, leaving only D).
For the third question, we know that stomata/guard cells control a variety of cellular (and extracellular) activities in plants. When the stomata are closed, rates of transpiration decrease due to the inability of water to escape. When they are open, however, rates of transpiration increase and the plant loses more water. The most similar thing to that in the human body would have to be our pores, which open and close in response to stimuli (they release sweat when we're too hot, trigger the production of oils in our skin, etcetera). The other choices do not make much sense; for example, capillaries are used for distributing and receiving supplements from the soil and do not control transpiration.
Use logical reasoning and remember that stomata/guard cells control gas exchange and water loss. I recommend watching Hank Green's videos on plants if you are truly confused.
I hope I helped! :)
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What are the Archeabacteria's Characteristics
Answer:
Most protists are unicellular. You may be wondering why those protists are not classified in the Archaebacteria or Eubacteria kingdoms. It is because, unlike bacteria, protists are complex cells.
Also:
Among these three main types of archaea are some subtypes, which include: Methanogens — archaeans that produce methane gas as a waste product of their "digestion," or process of making energy. Halophiles — those archaeans that live in salty environments.
Didn't Cheat!
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Answer:
Archaebacteria are the prokaryotic anaerobic bacteria.
Explanation:
Archaebacteria are the prokaryotic bacteria. They live in an extremely harsh environment. They are different from the other bacteria with some characters like their habitat. Their cell wall don't have peptidoglycan like other bacteria. Archaebacteria are resistance to penicillin and some other antibiotics. These are of three groups such as methanogens, Halophiles, and thermoacidophiles.
Methanogens are methane-producing bacteria and used as fuel. Halophiles are found in saline water and heavy salt concentration. They contain red carotenoid pigment in the cell. So they appear red. Thermoacidophiles can live in extremely high temperatures and high acidity.
Which of the following is an example of maintaining homeostasis?
A. Drinking water
B. Learning math
C. Playing board games
D. Calling friends
Answer:
I think its A. Drinking water.
Drinking water is example of maintaining homeostasis.
Explanation:
Homeostasis is the ability of a system to remain in equilibrium in terms of temperature or to maintain other physiological features. Since the sweating is responsible for cooling down the elevated body temperature hence drinking water can help in maintaining homeostasis. Homeostasis is a state where the proper functioning of body can take place. If the body is out of homeostasis or equilibrium then the function of the body will not be able to execute properly.
What are the dated fossils called that help scientists to identify or date rocks or fossils?
Answer:
Index fossils
Explanation:
The index fossils are the fossils that come in very handy for the geologists when it comes to identifying or dating rock samples or other fossils. The reason for this is that the index fossils have already been dated. They are fossils that are very commonly found, wide dispersed, are easy to be identified, and are limited to only a certain geological period. These characteristics make them an excellent indicator for the dating of the rock layers in which they are found, or the fossils found in the same layers with them, without conducting further examinations.
Which of the following foods is the most nutrient dense?
a. 4 oz French fries
b. 4oz baked white potato
C. 4 oz baked sweet potato
d. 4 oz Potato chips
The most nutrient dense food among the provided options is the 4 oz baked sweet potato due to its high levels of beta-carotene, vitamin C, and dietary fiber.
Explanation:Among the options provided (4 oz French fries, 4oz baked white potato, 4 oz baked sweet potato, 4 oz Potato chips), the food that is the most nutrient dense is the 4 oz baked sweet potato. Nutrient density refers to the amount of vitamins, minerals, and other nutrients you get per calorie in the food.
Sweet potatoes are incredibly high in beta-carotene (which your body converts into vitamin A), vitamin C, and dietary fiber among other nutrients. This makes them an excellent example of a nutrient dense food. The other options, such as French fries or potato chips, are often high in unhealthy fats and salts, making them less nutrient dense.
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4 oz baked sweet potato is the most nutrient-dense option mentioned, containing a variety of vitamins and minerals with low calorie content.
Explanation:Of all the options provided, the most nutrient-dense food is the 4 oz baked sweet potato. A nutrient-dense food is one that provides a high amount of vitamins, minerals, and other health-promoting nutrients with relatively few calories. The baked sweet potato contains a rich supply of vitamins such as Vitamin A, C, as well as dietary fiber and potassium. In comparison, French fries and potato chips are typically high in unhealthy fats and sodium, while a white potato, though healthy, does not have as many vitamins or minerals as a sweet potato.
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vesichles are responsible for
a. synthesis
b. formation of DNA
c. storage and transport of matariel
d. cell growth
please help
Answer:
Vesichles are responsible for storage and transport of material.- c.